Question

If A is the set of all integral multiples of 3 and B is the set of all integral mulriples of 5, then A∩B

is the set of all integral multiples of


a) 3 + 5
b) 5 – 3
c) G.C.D of (3, 5)
d) L.C.M of (3, 5)​

Answer 1

Given:

A = {x: x is a multiple of 3}

B = {y: y is a multiple of 5}

To find:

A ∩ B

Solution:

A ∩ B means the values which are present both in set A and in set B

Thus, those values are the the multiples of the LCM of 3 and 5

Option (D) LCM of (3,5) is right.